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2.7n
W1900_W2100_RTX
C1085
L1020
L1021
1.8n
1.2p
TP2
WCDMA DUAL
FL1007
C1111
6
ANT
W850_W900_RTX
1.8n
C1112
L1033
5.6n
0.5p
2
GND1
4
GND2
5
GND3
RTR6285 Maximum output Power = 7 dBm
RTR6285 minimum output Power = -80 dBm
LGE Internal Use Only
L1015
2.4n
L1016
C1076
12n
1.8p
FL1006
6
1
ANT
RX
3
TX
2
9
GND1
GND6
C1091
C1089
4
8
GND2
GND5
1p
10n
5
7
GND3
GND4
Band II
PDET_IN
R1018
TP3
VBAT
2.7p
RX_WCDMA_900_P
L1029
C1103
C1104
DNI
15n
2.7p
RX_WCDMA_900_M
L1031
1
RX1
8
RX2
L1034
3
TX
3.9n
9
GND5
C1116
DNI
7
GND4
1.2p
C1117
Band V
Check ANT_SEL 0,1,2
(High, Low, Low)
Check TP1 Over 21dBm?
No
Check TP2 Over 21dBm?
No
Check TP3 Over 21dBm?
No
Check TP4 Over 7dBm?
No
Check PAM Block
Refer to 1.5.4
RX_WCDMA_HB
VBAT
C1081
C1082
U1002
2.2u
330p
11
PGND
10
VCC2
VCC1
9
RFOUT
RFIN
8
CPL_IN
VMODE_1
7
GND
VMODE_0
6
CPL_OUT
VEN
R1017
51
R1019
8dB
110
110
2
C1096
C1097
2.2u
680p
1
U1003
11
PGND
10
1
VCC2
VCC1
9
2
RFOUT
RFIN
8
3
CPL_IN
VMODE_1
7
4
GND
VMODE_0
6
5
CPL_OUT
VEN
Yes
RF Tx Level is OK
Yes
Check TX Module
Yes
Check Duplexer
Yes
Check RTR6285A
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Copyright © 2013 LG Electronics. Inc. All right reserved.
3. TROUBLE SHOOTING
C1080
Close to pin1
330p
FL1004
1
22
2
4
1
OUT
IN
G3
G2
G1
3
L1023
3G_PAM_MODE
4
5
3
2
PA_R0
C1200
5
PA_ON0
DNI
C1090
100
C1093
C1094
100p
100p
TP4
C1095
4dB attunation
680p
R1020
22
FL1008
C1101 1n
4
1
OUT
IN
G3
G2
G1
3G_PAM_MODE
5
3
2
PA_R0
DNI C1107
PA_ON1
C1109
C1110
100p
100p
Only for training and service purposes
22
W1900_W2100_TX_OUT
C1087
C1088
100
L1102
33p
W850_W900_TX_OUT
C1108
DNI
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Troubleshooting
